Eliminate pointless casts from void* in a few driver irq handlers.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index a8e8084..fd771a4 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -381,7 +381,7 @@
 
 static irqreturn_t tis_int_probe(int irq, void *dev_id)
 {
-	struct tpm_chip *chip = (struct tpm_chip *) dev_id;
+	struct tpm_chip *chip = dev_id;
 	u32 interrupt;
 
 	interrupt = ioread32(chip->vendor.iobase +
@@ -401,7 +401,7 @@
 
 static irqreturn_t tis_int_handler(int irq, void *dev_id)
 {
-	struct tpm_chip *chip = (struct tpm_chip *) dev_id;
+	struct tpm_chip *chip = dev_id;
 	u32 interrupt;
 	int i;